Improvement in pumps



J. I. HURLBUTT. PUMP.

No. 105,337.- Patented July 42,1870.

'iiitlil;

JAMES-I. 'HURLBUTT,

0F NOR W A UK,

was Patent No, 105,331, dated my 12,1870.

mpnovnmmvr m PUMPS.

The Schedule referred to these Letters Patent and making part of thesalts .To an whom it may concern:

Be it known that I, JAMEs 1.,HURLBU'1T, bfNorwalk, the county of .Huronand State of Ohio, have invented certain new and useful Improvementsiu'Pumps; andI do hereby declare the following to whereby said plunger.is operated.

.It also comprises the employmentof a perforated ,tuhe, and-anair-chamber within the pump-stock,

whereby pressure-isexerted on the elevated water, causing a steady anduninterrupted flow, the air being allowed to escape withont breaking thestream, as

will be hereinafter more fully described.

In the accompanying drawing, wherein similar letters of referenceindicate like. parts in .the two figiires- A A may represent the wholelcngthof the pumpstock, the lower part A, with the chest B, beingsubmerged in the water at the bot-tom of the well, while the upper partA issituated above ground,

The chest B is secured to the outside .of the stock A, and communicateswith "the interior" thereof by way of the opening a.

- The orifice b, in thc side of the chest at this point,

is covered by a valve,,c.

cl represents the valve and opening in the chest, through which, whenthe latter is sn'bmerged, water isldrawn into the chest by the action ofthe plunger D in the cylinder or barrel 0, which communicates with thechest, as clearly shown in fig. 2.

The plunger D is provided with a yoke, e, to which is pivoted one end ofthe. lever 1 This lever works on an axis or fulcrum, f, and moves inslots 'in the pump-stock and barrel, as shown.

The. outer end of lever I is connected by one or more rods, g, with thepump-handle or hand operating lever G, situated at a convenient heightabove grounib v H represents an air-chamber situated within thepump-stocknear its top, and communicating with a peribrated'tubcxll,which extends down the inside of' 'thepump-stock and through a plug, i,fitted therein j is another tube communicating with the air-chant her H,and bent or curved so that its lower end opens into the delivery-spout kof the pump. 'lhc operation is-as follows:

' "lhc upward motion of the o mrating-lever causes the descent of theplmigcr, whereby, (the chest being entirely submerged) water is drawn inat the opening (I and fills the barrel. 7 When the plunger ascends, itforces the water from the barrel into the pump-stock, from which it isdischarged in. a continuous stream at the spent it. This continuousflow-is the result of the employmeut of the air-chamber and tubes, aswill be now dc scribed.

, Were a'n air-chamber and tubes not employed, the bubbles formed by theaction of the plunger in force 'ing water from the cylinder into thepump-stock, and gathering in .the center of the columnof water, wouldrise with the lattcr to the spent; and, the columnbrcaking at this poiuta portion. of, the bubbles would follow-the water out at the spout,while the remain.-

der would rise with that part of the column which ascends tethe top ofthe pump, and return in bubbles to and out-at the spout, causing a,break in the stream of ,water.

When theair-chambcr and tubes are employed, the. air contained in thecolumn. of water in the stock finds its wayinto the long tube throughthe holes therein, and is forced up into the air-chamber (whence aportion of it escapes through the short bent pipe without breaking thestream) by the water, which, at

the downward stroke of the handle, fills not only the pump-stock, butalso the long tube and the air-chamher, up to a certain point, accordingto the pressure of air in the chamber.

' I Asthc handle is raised, theair in the chamber exerts a pressure onthe water in the vertical tube, and forces it therefrom through theperforations, and the valves being closed, the water. is made to run outat. the spout;

The s'hortlicnt tube being made smaller in dianr-- eter than the maintube, there always remains sufiicien't air in the chamber toiorce theair'down in the tube;

and out atthc holes therein, as just stated.

As the pressure of air on the water in" the tube is naturally greaterthan on that in the well, theprcss- 'ure is equalized by allowing theexcess to escape from the tube by having the latter passthrough a plugand left open below, as described,-whereas, if the tube.

quantity of water with n. saving-of at leastv twenty' per cent of thepower which would be necessary with out the appliances mentioned, andwith a continuous der 0, plunger 1),:md lever- F, the air-chamber H,

flow. and tubes j h, and the hand-lever and connecting- Havhg thusdescribed my invention, rod G 9, all constructed and arrangedsubstantially as \Vhat I claim as new,'m1d desire to secure byLetdescribed, with the stock A A, and operating as set ters Patent, is--forth.

1. The combination of the air-chamber, perforated JAMES I. HURLBUTT.tube h, and tube j, arranged andoperating substnutially as deseriberL.Witnesses:

2. Theimproved pump herein described, hzwingits ETHAN A. PRAY, essentialfeatures, viz., the submerged chest B, cylin- SIMEON F. ROGERS.

